Why 45-Year-Old Fighters Outwork 18-Year-Olds (It’s Not Talent)
Don Heatrick2026-09-15T20:27:34+01:00"Everything declines after 30" is the line every fighter over 30 has been told. It's wrong, and I can prove it. And that proof starts with two performance curves moving in opposite directions. It comes down to two numbers. [...]




















